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Pfizer and BioNTech's COVID-19 vaccine is 100% effective against the virus in children ages 12 to 15, the companies announced in a press release on Wednesday. The vaccine is already authorized for use in people and produced…

Nigeria has vaccinated 566,917 people with the first dose of AstraZeneca vaccine. This is According to an update by the National Primary Health Care Development Agency (NPHCDA) on Monday. The figure represents 28.2 per cent of the…